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- fixed some line clipping issues with portals 

* Blocking lines above or below the current sector should only block if they actually intersect with the currently checking actor.
 * Sectors above a ceiling portal should not change current floor information and vice versa.
This commit is contained in:
Christoph Oelckers 2016-02-23 16:59:16 +01:00
parent 1f09341d2b
commit 58839200e5
1 changed files with 102 additions and 30 deletions
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76
src/p_map.cpp
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@ -748,6 +748,30 @@ int P_GetMoveFactor(const AActor *mo, int *frictionp)
}
//==========================================================================
//
// Checks if the line intersects with the actor
// returns
// - 1 when above/below
// - 0 when intersecting
// - -1 when outside the portal
//
//==========================================================================
static int LineIsAbove(line_t *line, AActor *actor)
{
AActor *point = line->frontsector->SkyBoxes[sector_t::floor];
if (point == NULL) return -1;
return point->threshold >= actor->Top();
}
static int LineIsBelow(line_t *line, AActor *actor)
{
AActor *point = line->frontsector->SkyBoxes[sector_t::ceiling];
if (point == NULL) return -1;
return point->threshold <= actor->Z();
}
//
// MOVEMENT ITERATOR FUNCTIONS
//
@ -788,6 +812,13 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
if (!ld->backsector)
{ // One sided line
if (((cres.portalflags & FFCF_NOFLOOR) && LineIsAbove(cres.line, tm.thing) != 0) ||
((cres.portalflags & FFCF_NOCEILING) && LineIsBelow(cres.line, tm.thing) != 0))
{
// this blocking line is in a different vertical layer and does not intersect with the actor that is being checked.
// Since a one-sided line does not have an opening there's nothing left to do about it.
return true;
}
if (tm.thing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tm.thing, NULL, NULL, tm.thing->Mass >> 5, NAME_Melee);
@ -817,6 +848,41 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
(tm.thing->player != NULL && (ld->flags & ML_BLOCK_PLAYERS)) || // block players
((Projectile) && (ld->flags & ML_BLOCKPROJECTILE)) || // block projectiles
((tm.thing->flags & MF_FLOAT) && (ld->flags & ML_BLOCK_FLOATERS))) // block floaters
{
if (cres.portalflags & FFCF_NOFLOOR)
{
int state = LineIsAbove(cres.line, tm.thing);
if (state == -1) return true;
if (state == 1)
{
// the line should not block but we should set the ceilingz to the portal boundary so that we can't float up into that line.
fixed_t portalz = cres.line->frontsector->SkyBoxes[sector_t::floor]->threshold;
if (portalz < tm.ceilingz)
{
tm.ceilingz = portalz;
tm.ceilingsector = cres.line->frontsector;
}
return true;
}
}
else if (cres.portalflags & FFCF_NOCEILING)
{
// same, but for downward portals
int state = LineIsBelow(cres.line, tm.thing);
if (state == -1) return true;
if (state == 1)
{
fixed_t portalz = cres.line->frontsector->SkyBoxes[sector_t::ceiling]->threshold;
if (portalz > tm.floorz)
{
tm.floorz = portalz;
tm.floorsector = cres.line->frontsector;
tm.floorterrain = 0;
}
return true;
}
}
else
{
if (tm.thing->flags2 & MF2_BLASTED)
{
@ -828,7 +894,7 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
return false;
}
}
}
fixedvec2 ref = FindRefPoint(ld, cres.position);
FLineOpening open;
@ -867,6 +933,8 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
}
// adjust floor / ceiling heights
if (!(cres.portalflags & FFCF_NOCEILING))
{
if (open.top < tm.ceilingz)
{
tm.ceilingz = open.top;
@ -875,7 +943,10 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
tm.ceilingline = ld;
tm.thing->BlockingLine = ld;
}
}
if (!(cres.portalflags & FFCF_NOFLOOR))
{
if (open.bottom > tm.floorz)
{
tm.floorz = open.bottom;
@ -894,6 +965,7 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
if (open.lowfloor < tm.dropoffz)
tm.dropoffz = open.lowfloor;
}
// if contacted a special line, add it to the list
spechit_t spec;
@ -903,7 +975,7 @@ bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::Chec
spec.refpos = cres.position;
spechit.Push(spec);
}
if (ld->portalindex >= 0)
if (ld->portalindex >= 0 && ld->portalindex != UINT_MAX)
{
spec.line = ld;
spec.refpos = cres.position;